<<<<<<< HEAD
int exchange(int *xp,int y){
	int x=*xp;
	*xp=y;
	return x;
=======
int exchange(int *xp,int y){
	int x=*xp;
	*xp=y;
	return x;
>>>>>>> a9f1309d540fee3c464a41eaf6626eb0136d06d4
}